To add to Chris' post about the 700 for Silhouette and BR
- The 700 is lighter than the M-70 (bot BR and Silhouette have weight limits)
- The 700 has always been the top dog of commercial actions in competitions where the "Nth" degree of accuracy is the most important characteristic
I think the most important reason that we see more Wins in Highpower and Rems in BR has much less to do with the performance of either action and more to do with what folks "fell into".
The M-70 was introduced in 1937 and was the most reliable and accurate rifle of the time so it quickly established dominance in Highpower. The Rem action came along in 1948, which was a little after Benchrest started to be competed. The 222 Rem in the M-722 was such an accurate combination that it quickly began to dominating BR.
As each respective discipline evolved, they built on the M-70 in Highpower and the M-722 (then the very similar M-700/40X) in BR. All the aftermarket parts and expertise were with the M-70 in Highpower in M-700 in BR, so when you wanted to get into the sport, your best chance of success was to start with what everyone else was using.
BTW, the primary reason most 700/40X BR rifles use a Sako extractor is because of the 6mm PPC. The 6 PPC has become the dominate chambering in little BR, and it has a non-standard bolt face size. Rem does not make a bolt face or extractor that fits the 6 PPC rim, so you must use a Sako extractor to use the PPC.
IIRC, Silhouette came to the US (seriously) in the 1960s. The first national competition was held near Tucson at the range where I shoot in 1969. Because of their success in BR, Rems had established themselves as the "accuracy standard" all other rifles were judges by. Guys could go buy an off-the-shelf 700, scope it, make weight, and be very competitive. This is not to say an off-the-shelf M-70 (espeically a PF M-70) wouldn't work, it's just guys started with the Rems, got used to them, and had no reason to change.
Rems beat out the M-70 as the Marine Sniper rifle in 1969 and have kept that position since. I think the Marines could do better today with an aftermarket action, but I think they have become so used to the 700/40X they see little reason to change. I think because the USMC uses the 700/40X, it was a natural progression for tactical rifles to start with the 700/40X given tactical competiton is kind of based on the military sniper craft.
Interestingly, before David Tubb switched to custom actions, he used appears to have used a M-70 in Highpower and a M-700 in Silhouette. Truth be told, either action will work for either application, but both are surpassed nowadays by custom actions.
Last edited by Blaine; 02/13/06.